[FFmpeg-cvslog] avcodec/avs2: add AVS2 related definitions
Zhao Zhili
git at videolan.org
Fri Jun 24 10:43:38 EEST 2022
ffmpeg | branch: master | Zhao Zhili <quinkblack at foxmail.com> | Mon Jun 13 11:36:32 2022 +0800| [592a9e57d9aa4540c7bcdbbed315338990164f2f] | committer: Zhao Zhili
avcodec/avs2: add AVS2 related definitions
Replace magic numbers by enum values.
Signed-off-by: Zhao Zhili <zhilizhao at tencent.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=592a9e57d9aa4540c7bcdbbed315338990164f2f
---
libavcodec/avs2.h | 41 +++++++++++++++++++++++++++++++++++++++++
libavcodec/avs2_parser.c | 6 +-----
2 files changed, 42 insertions(+), 5 deletions(-)
diff --git a/libavcodec/avs2.h b/libavcodec/avs2.h
new file mode 100644
index 0000000000..7b66f51998
--- /dev/null
+++ b/libavcodec/avs2.h
@@ -0,0 +1,41 @@
+/*
+ * AVS2 related definitions
+ *
+ * Copyright (C) 2022 Zhao Zhili, <zhilizhao at tencent.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_AVS2_H
+#define AVCODEC_AVS2_H
+
+#define AVS2_SLICE_MAX_START_CODE 0x000001AF
+
+enum {
+ AVS2_SEQ_START_CODE = 0xB0,
+ AVS2_SEQ_END_CODE = 0xB1,
+ AVS2_USER_DATA_START_CODE = 0xB2,
+ AVS2_INTRA_PIC_START_CODE = 0xB3,
+ // reserved = 0xB4,
+ AVS2_EXTENSION_START_CODE = 0xB5,
+ AVS2_INTER_PIC_START_CODE = 0xB6,
+};
+
+#define AVS2_ISPIC(x) ((x) == AVS2_INTRA_PIC_START_CODE || (x) == AVS2_INTER_PIC_START_CODE)
+#define AVS2_ISUNIT(x) ((x) == AVS2_SEQ_START_CODE || (x) == AVS2_SEQ_END_CODE || (x) == AVS2_USER_DATA_START_CODE || AVS2_ISPIC(x))
+
+#endif
diff --git a/libavcodec/avs2_parser.c b/libavcodec/avs2_parser.c
index b7d5d7774e..3755dbd78c 100644
--- a/libavcodec/avs2_parser.c
+++ b/libavcodec/avs2_parser.c
@@ -19,13 +19,9 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include "avs2.h"
#include "parser.h"
-#define AVS2_SLICE_MAX_START_CODE 0x000001AF
-
-#define AVS2_ISPIC(x) ((x) == 0xB3 || (x) == 0xB6)
-#define AVS2_ISUNIT(x) ((x) == 0xB0 || (x) == 0xB1 || (x) == 0xB2 || AVS2_ISPIC(x))
-
static int avs2_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size)
{
int pic_found = pc->frame_start_found;
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